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Class D Amplifier FAQs
Covers amplifier selection, & filters, Zobel circuits, testing, and PCB layout & grounding

 

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  • Analog Product Guide including audio product selection tables
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Hear audio noise suppression online demo


LMV1091 - Dual Input, Far Field Noise Suppression Microphone Amplifier

 

LME49600 audio buffer  honored
with the prestigious
2008 Product of the Year Award

 

National's LM4562 has been awarded as a winner in EDN magazine's list of Hot 100 Products and in Electronic Product's 2006 Product of the Year Awards.

 

The LM4562 is a Dual High Performance, High Fidelity Audio Operational Amplifier. The LM4562 features an ultra-low THD of 0.00003% and is optimized for superior audio signal fidelity.

 

 

  

Audio Amplifier Online Education:

Signal-Path Designer
 Published every other month, Signal-Path Designer's feature articles cover signal-path design techniques.

 

 

 

WHAT'S NEW
Audio Products
  • Dual Input, Far Field Noise Suppression Microphone Amplifier
  • Ultra Low EMI, Filterless, 1.2W Stereo Class D Audio Power Amplifier with E2S and National 3D Enhancement
  • Mono, Bridge-Tied Load, Ceramic Speaker Driver with I2C Volume Control and Reset
  • Ultra-Low EMI, Filterless, 2.6W, Mono, Class D Audio Power Amplifier with E2S
  • Dual Input, Far Field Noise Suppression Microphone Amplifier
  • Mono Class D Audio Codec Subsytem with Ground Referenced Headphone Amplifiers, Earpiece Driver, and Audio DSP
  • Mono Class D Audio Subsystem with Earpiece Driver, Ground Referenced Headphone Amplifiers, Speaker Protection and No Clip with Clip Control
  • Class G Headphone Amplifier with I2C Volume Control
  • High Performance Audio Codec Sub-System with a Ground-Referenced Stereo Headphone Amplifier & Ultra Low EMI Class D Loudspeaker Amplifier with Dual I2S/PCM Digital Audio Interfaces
  • Audio Sub-System with Stereo DAC, Mono Class AB Loudspeaker Amplifier, OCL/SE Stereo Headphone Output and RF Suppression

 

Audio Application Notes
  • AN-1849 - An Audio Amplifier Power Supply Design
  • AN-1768 - LME49600 Headphone Amplifier Evaluation Board User's Guide
  • AN-1622 - LM49100 Evaluation Board User's Guide
  • AN-1567 - LM4949 Demonstration Board
  • AN-1591 - The LM49370 PCM/I 2 S Bridge

 

Audio Evaluation Boards
  • LME49720NABD - 34V High Performance, High Fidelity Dual Audio Operational Amplifier
  • LME49720HABD - 34V High Performance, High Fidelity Dual Audio Operational Amplifier
  • LME49720MABD - 34V High Performance, High Fidelity Dual Audio Operational Amplifier
  • LMV1088RLEVAL - Evaluation Kit for the LMV1088RL

 

Audio Models & Software
  • Spice Model for LM4562, LME49710, LME49720, and LME49740 (zip file)
  • Audio Selection Guide Software


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